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drm/amd/display: Read DP tunneling support only for DPIA endpoints

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Unconditionally reading DP tunneling support results in extraneous
errors messages on certain devices. Fix this by guarding the DPCD read
for DP tunneling support for USB4 DPIA endpoints.

Reviewed-by: Meenakshikumar Somasundaram <meenakshikumar.somasundaram@amd.com>
Signed-off-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Aurabindo Pillai
2024-10-30 18:06:18 +00:00
committed by Alex Deucher
parent 9517aa5b0a
commit 15b9f629fb
1 changed files with 5 additions and 3 deletions
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8
drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c
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@@ -1633,9 +1633,11 @@ static bool retrieve_link_cap(struct dc_link *link)
}
/* Read DP tunneling information. */
status = dpcd_get_tunneling_device_data(link);
if (status != DC_OK)
dm_error("%s: Read tunneling device data failed.\n", __func__);
if (link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA) {
status = dpcd_get_tunneling_device_data(link);
if (status != DC_OK)
dm_error("%s: Read tunneling device data failed.\n", __func__);
}
dpcd_set_source_specific_data(link);
/* Sink may need to configure internals based on vendor, so allow some